MATHEMATICAL MODELING OF HETEROGENEOUS CATALYTIC REACTORS

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Abstract
It is well known that in the practical employment of catalysts in commercial reactors, physical processes may play an important and even dominant role in the overall conversion scheme. Such physical processes may include mass transfer both within and external to the catalyst particles and the analogous effects of heat transport. In addition, for packed beds, dispersion of mass and heat in both the axial and radial directions may be important. The intra-particle effects arise because of the significant size of the catalyst particles which in turn is dictated by the requirement that the pressure drop within the reactor shall not be excessive. In practice, catalyst pellets up to about 1 cm in diameter are often employed.

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